Blood blisters should be left to burst on their own without puncturing them. If they burst, the spots should be cleaned, dried and protected to prevent infections. The blisters will heal naturally without any medication,... More »

When blisters are small, the safest approach is to avoid popping them; however, if they are on a weight-bearing area of the foot that prevents walking, Mayo Clinic recommends draining the blister using a disinfected need... More » Health Conditions & Diseases Skin Conditions

HowStuffWorks does not recommend popping a fever blister, or cold sore, as doing so allows the liquid inside to spread the virus. There are many steps to take that encourage healing of a fever blister. More »

Blood blisters should be left alone and be allowed to heal on their own unless it is too large and painful, in which case it would be better to drain it with care. A blister should not be drained if the person has HIV, ... More » Health Conditions & Diseases Skin Conditions

Blood poisoning, also called bacteremia, occurs when bacteria enter the blood, according to the Mayo Clinic and WebMD. Left untreated, bacteremia can damage heart valves and other bodily tissues. Further delay may cause ... More » Health Conditions & Diseases

Blood clots are typically diagnosed with ultrasounds, blood tests and venography, according to eMedicineHealth. If doctors suspect a pulmonary embolism, a CT scan with contrast or ventilation perfusion may be ordered. More » Health Conditions & Diseases

Blood in the urine, which may be red, pink or brown in color, is a common symptom of a urinary tract infection, notes Mayo Clinic. The presence of blood in the urine is a specific symptom of cystitis, which is a type of ... More » Health Conditions & Diseases